Latch mechanism for doors



Aug. 27, 1929. BRUMMER 1,725,846

LATCH MECHANISM FOR DOORS I Fil ed June 29, 1927 2 Sheets-Sheet 1 Aug. 27, 1929. F. BRUMMER 1,725,846

LATCH MECHANISM FOR DOORS Filed June 29, 1927 2 Sheets-Sheet 2 Passes Aug. 27, 1929.

EJNETED ST res PATENT oFFicE.

FRED BRUIv/LMER, OF BATESVILLE, INDIANA, ASSIGNOR F ONE-HALF TO PAUL V. WYCOFF, 0F BATESVILLE, INDIANA.

LATCH MECHANISM FOR DOORS.

Application filed June 29, 1927. Serial No. 202,302.

This invention relates to an automatic door opening mechanism and while especially designed for quick entrance and exlt to and from fire engine houses, may also be used to advantage on public and private garages.

The invention consists in the novel features of construction, combination and arrangement of parts illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

In the accompanying drawings, which are for illustrative purposes only and are there fore not drawn to scale:

Figure 1 is a side elevation, illustrating the application of my invention, looking at the doors from the inside and with the spring bolts in place.

Figure 2 is a similar view, the spring bolts released.

Figure 3 is a vertical transverse section.

Fig. at is a vertical section taken on line tt of Fig. 1.

Referring to the drawings for a more particular description of my invention and in which drawings like parts are designated by like reference characters throughout the several views, A and B designate two doors of a fire engine house (not shown) adapted to swing inwardly and O my improved door opening mechanism.

This mechanism comprises, first, a pair of sashcords 1 or other flexible elements attached at one end, as at 2, to the upper inner corners of the doors A and B and extending rearwardly over the pulleys 3 and provided at their free ends wit the weights 4.

A horizontal trigger bar 5 is pivoted adjacent one end, as at 6, to the inner face of the door 13 and the sliding spring bolts 7 and 8 mounted at the upper inner and lower inner corners of door B are connected with the trigger bar 5 through the medium of the chains 9 and 10 or other flexible elements. Chain 10 is connected with the extreme pivoted end of the trigger bar about three inches from the pivot point 6 and chain 9 similarly connected with the pivoted end of the trigger bar about the same distance from the opposite side of the pivot point.

A cord 11 or other flexible element is connected at its upper end as at 12, to the free end of the trigger and extends downwardly and outwardly over the pulleys 13 and 14,

respectively. The lower free end of this cord is provided with a Weight 15.

A trigger bar releasing cord 16 is attached at its lower end to the trigger 17 of said bar and atter passing upwardly over the guide pulleys 18 and 19 mounted on the door B is fastened at its upper end, as at 20, at a convenient point over the door. This releasing cord is arranged within convenient reach of the driver of the fire truck when on duty.

The bottom of each door is equipped with a small hinged stop 21 to hold same in place when open.

For opening'the doors quickly from the outside, I provide an iron plunger 22 which extends transversely through door B with its outer free end bearing against the glass panel 23 of the housing 24 mounted on the exterior of said door. The inner end of the plunger is connected as at 25, with the lower end of the vertical lever 26, fulcrumed as at 27, to the bracket 28 and having suspended from its upper end the weight 29. The upper end 30 of lever 26 is connected by the cord 31 or other flexible element with the trigger releasing cord 16. Opening the doors quickly from the outside is accomplished by simply breaking the glass panel 23 which releases the plunger 22 and through the medium of the connections herein described, releases the trigger bar 5 and retracts or releases the spring bolts 7 and 8. A small iron Weight may be positioned on the outside of one of the doors for immediate convenience in breaking the glass panel 23.

For operating lights in the building, there is attached to the inner side of door panel near top, a sash cord 32 connected with electric knife switch 33 to which weight 34: is

attached. By this arrangement, the lights in building are thrown on when doors are opened and thrown off when doors are closed. The lights in the building are controlled from a. separate switch (not shown) when lights are desired when doors are closed.

For opening garage doors from the outside, a pull cord extending outwardly through conduit to a suitable point in convenient reach from the drivers seat, is provided.

From the foregoing description taken in connection with the drawing, it is thought that the construction, operation and advantages of my inventlon will. be readily understood without requiring a more extended explanation.

Various changes in the form, proportions and minor details of construction may be resorted to without departing from the principles or sacrificing any of the advantages of my invention as defined in the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. Latch mechanism for doors comprising latch. members, a pivoted trigger bar, flexible elements connecting the trigger bar with the latch members, a weight connected with one end oi the trigger bar and manually operated release means for the trigger bar.

2. Latch mechanism for doors comprising latch members, a pivoted trigger bar, flexible elements connecting the trigger bar with the latch members, a weight connected with one end of the trigger bar, manually operated release means for the trigger bar and secondary release means for the trigger bar.

3. Latch mechanism for doors comprising latch members a pivoted trigger bar, flexible elements connecting the trigger bar with the latch members, a weight connected with one end of the trigger bar, manually operated release means for the trigger bar and means including a plunger for tripping or releasing the trigger bar from the outside.

In testimony whereoi he aflixes his signature.

FRED BRUMMER] 

